Sounds like it's your video card drivers. By default windows is "set" to restart when it crashes.
Go to "My Computer/properties/advanced/startup and recovery/settings/" and UNtick "automatically restart". This way, when windows crashes the cause of the crash will be displayed in a BSOD(blue screen of death).
This should help you to narrow down the cause.
I'll be that it's a driver issue though.

NOTE: The latest drivers for you video card aren't always the best ones to use. make sure the drivers are MULTITHREADED.

Message edited on: 01/02/2006 04:01

It's a shame stupidity isn't painful.